Yes it will. I saw a 2005 545i that fooled the crap out of me at Bimmerfest last
year. As you approached it from the back it looked like a 2008 550i with the M
sport pack even with the style 172 rims and was debadged. It's only when you saw
the door handles inside and window switches was when you realized it was a pre-LCI.
He told me afterwards too, and he even got the LCI lights front and rear. It was nice.

So, basically exterior wise you can easily make a pre-LCI look like an LCI.